A pickup truck's weight depends on the model, make and size of the truck. Normally, a pickup truck would weigh from 1750 lbs to 4550 lbs, but even that is just a guess since the exact numbers vary from one truck to the next. A pickup truck's weight depends on the model, make and size of the truck.
rods and cones. The photoreceptor cells of the retina. They are between the pigment epithelium and the bipolar layer of neurons. The rods contain rhodopsin, which is stimulated by light; the cones contain one of three other photopigments, which are stimulated by various wavelengths of visible light (colors).
Central and Peripheral Vision. The light-sensitive rods and cones form a tightly packed network.Each eye contains 100 million rods and 3 million cones but they are not distributed evenly. Rods are mainly located in the outer edges of the retina, and cones are clustered in the center.